Target FP: Use target format throughout expression parsing

[deliverable/binutils-gdb.git] / gdb / doublest.h

diff --git a/gdb/doublest.h b/gdb/doublest.h
index 692280db5f2129957b92f1e566472c29365ec196..4b9d6bcbc916589526172ff2338dc900c0698de8 100644 (file)
--- a/gdb/doublest.h
+++ b/gdb/doublest.h
@@ -1,13 +1,12 @@
 /* Floating point definitions for GDB.
-   Copyright 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
-   1997, 1998, 1999, 2000, 2001
-   Free Software Foundation, Inc.
+
+   Copyright (C) 1986-2017 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 2 of the License, or
+   the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
@@ -16,46 +15,13 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software
-   Foundation, Inc., 59 Temple Place - Suite 330,
-   Boston, MA 02111-1307, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #ifndef DOUBLEST_H
 #define DOUBLEST_H
 
-/* Setup definitions for host and target floating point formats.  We need to
-   consider the format for `float', `double', and `long double' for both target
-   and host.  We need to do this so that we know what kind of conversions need
-   to be done when converting target numbers to and from the hosts DOUBLEST
-   data type.  */
-
-/* This is used to indicate that we don't know the format of the floating point
-   number.  Typically, this is useful for native ports, where the actual format
-   is irrelevant, since no conversions will be taking place.  */
-
-#include "floatformat.h"       /* For struct floatformat */
-
-extern const struct floatformat floatformat_unknown;
-
-#if HOST_BYTE_ORDER == BIG_ENDIAN
-#ifndef HOST_FLOAT_FORMAT
-#define HOST_FLOAT_FORMAT &floatformat_ieee_single_big
-#endif
-#ifndef HOST_DOUBLE_FORMAT
-#define HOST_DOUBLE_FORMAT &floatformat_ieee_double_big
-#endif
-#else /* LITTLE_ENDIAN */
-#ifndef HOST_FLOAT_FORMAT
-#define HOST_FLOAT_FORMAT &floatformat_ieee_single_little
-#endif
-#ifndef HOST_DOUBLE_FORMAT
-#define HOST_DOUBLE_FORMAT &floatformat_ieee_double_little
-#endif
-#endif
-
-#ifndef HOST_LONG_DOUBLE_FORMAT
-#define HOST_LONG_DOUBLE_FORMAT &floatformat_unknown
-#endif
+struct type;
+struct floatformat;
 
 /* Use `long double' if the host compiler supports it.  (Note that this is not
    necessarily any longer than `double'.  On SunOS/gcc, it's the same as
@@ -66,22 +32,61 @@ extern const struct floatformat floatformat_unknown;
    host's `long double'.  In general, we'll probably reduce the precision of
    any such values and print a warning.  */
 
-#ifdef HAVE_LONG_DOUBLE
+#if (defined HAVE_LONG_DOUBLE && defined PRINTF_HAS_LONG_DOUBLE \
+     && defined SCANF_HAS_LONG_DOUBLE)
 typedef long double DOUBLEST;
+# define DOUBLEST_PRINT_FORMAT "Lg"
+# define DOUBLEST_SCAN_FORMAT "Lg"
 #else
 typedef double DOUBLEST;
+# define DOUBLEST_PRINT_FORMAT "g"
+# define DOUBLEST_SCAN_FORMAT "lg"
+/* If we can't scan or print long double, we don't want to use it
+   anywhere.  */
+# undef HAVE_LONG_DOUBLE
+# undef PRINTF_HAS_LONG_DOUBLE
+# undef SCANF_HAS_LONG_DOUBLE
 #endif
 
+/* Different kinds of floatformat numbers recognized by
+   floatformat_classify.  To avoid portability issues, we use local
+   values instead of the C99 macros (FP_NAN et cetera).  */
+enum float_kind {
+  float_nan,
+  float_infinite,
+  float_zero,
+  float_normal,
+  float_subnormal
+};
+
 extern void floatformat_to_doublest (const struct floatformat *,
                                     const void *in, DOUBLEST *out);
 extern void floatformat_from_doublest (const struct floatformat *,
                                       const DOUBLEST *in, void *out);
 
-extern int floatformat_is_negative (const struct floatformat *, char *);
-extern int floatformat_is_nan (const struct floatformat *, char *);
-extern char *floatformat_mantissa (const struct floatformat *, char *);
-
-extern DOUBLEST extract_floating (const void *in, int);
-extern void store_floating (void *, int, DOUBLEST);
+extern int floatformat_is_negative (const struct floatformat *,
+                                   const bfd_byte *);
+extern enum float_kind floatformat_classify (const struct floatformat *,
+                                            const bfd_byte *);
+extern const char *floatformat_mantissa (const struct floatformat *,
+                                        const bfd_byte *);
+
+extern std::string floatformat_to_string (const struct floatformat *fmt,
+                                         const gdb_byte *in,
+                                         const char *format = nullptr);
+extern bool floatformat_from_string (const struct floatformat *fmt,
+                                    gdb_byte *out, const std::string &in);
+
+/* Return the floatformat's total size in host bytes.  */
+
+extern size_t floatformat_totalsize_bytes (const struct floatformat *fmt);
+
+extern DOUBLEST extract_typed_floating (const void *addr,
+                                       const struct type *type);
+extern void store_typed_floating (void *addr, const struct type *type,
+                                 DOUBLEST val);
+extern void convert_typed_floating (const void *from,
+                                   const struct type *from_type,
+                                    void *to, const struct type *to_type);
 
 #endif